Brake cross shaft mounting



Dec. 2, 1930. C, 1 BOCK BRAKE cRoss SHAFT MOUNTING Filed Aug. 10. 1928IIIIIINH i VA n...

Patented Dec. 2, A193() UNITED STATE PATENT oFFi-cr. l

' j CARL YT. BOCK, OF PONTIAC, MICHIGAN; ASSIG-NOR TO YELLOW TRUCK COACHMANU- FACTURING CMPANY, QF PONTIAC, MICHIGAN A CORPORATIONIVOF MAINEBRAKE' cnoss SHAFT MOUNTING ,Application fuga August 1o, 192s. serialNo. 298,830.

front wheels. One important feature ofthe invention is theA mounting ofVthe j operating shafts on and adjacentV tov the` frontf aXle. therobjects and advantages will be understood from a'readi'ng of thefollowing description.

vIn the drawing:

Figure l illustrates 1n perspective the novel'l brake hook-up;

Figure 2 Vis a transverse section through the front axle showing thebrake actuating means in side elevation, the vview being substantiallyon line2-2 of Figure 3;

Figure 3 is aview of the actuating means.

in end elevation, the section being transverse- 1y` ofthe vehiclethrough the vehicle spring;

and Y A Figure 4`is'a planr View of a detail. Referring by referencecharactersto the drawing, numeral' is used to designate the chassis'frame, the frame being shown by dotted lines since it is not a part ofthis invention. n At 7 is shown the front aXle and at 9 the rear aXlehousing. The springs to support the chassis frame and body from theaxles are shown at 11. Each wheel is provided with a brake drum 13. Therear Wheel drum is engaged by an internal brake, not shown, foractuation by a hand lever 15. This lever 15, pivoted at 17, is intendedto pull arod 19 connected to an arm 2l rigid with shaft 23. The shafthas a second rigid arm 25.

To the arms 21 and 25 are connected rearwardly directed links 27. Eachlink is connected to an arm 29 on the shaft3l journaled in any preferredway. The shaft 31'is intended to apply the internal brakes and to thatend may be equipped with a cam 33, as shown in Figure l. The brakeconstruction thus far described is the conventional disassociated fromthe service brake.

i Surrounding each rear wheel brake drum.k

is a band 35 anchored asat 35' preferably to the `fixed backing plate,las usual. The adjacent ends of the band are arranged to be drawntogether to frictionally engage the drumby the rotation of` suitablyjournaled shafts 37. Lever arms 39 are carried by shafts 37, thesearmsbeing associated with rods 41 and springs 43 to apply the brakeinthe usual manner. The adjacentendsof shafts 37 have arms 38 said armsbeing con-V nected to an equalizer 42. At the middle point of equalizer42 is connected a 'link 43 extendin'gto an arm 45 serving as an idlerand conveniently mounted for rotation on shaft 23. From the end of idler45, link 47 extends to an equalizer 48 functioning to equalize betweenthe front Wheel brake system and the rear wheelbrake system. rlhelink`47 is pivoted'to the lower end of the equalizer, as at 49.`

A rockshaft 51 is located in a convenient4 'foI position intermediatethe ends of the vehicle,

pivotally conneoted'lwith a link 57 extendingv rearwardlyfrom a pedal59, the latter being pivoted as-at 61 to any convenient part of thevehicle chassis. f i

Between the front axle and rockshaft 51 is anidler arm 62; A link 63connects arm 62 From idlerV 62 a,

with arm 55 ofshaft 51. link 65 extends lforwardly toa position adjacentthe front'axle, links (S3-"and 65 eX- tending longitudinallyin aposition substantially midway between the side members of the frame. v

Clips 67 are". used to 'clamp springs l1 to the front axle 7 .i Thevaxle is formed'with a seat 69- to receive a spring and this seat isprovided with apertures to receive the legs This arml 55 yis for.connectionl so f of the clips. Between the lower leaf of the spring andthe seat 69 is a plate 71 terminating at the rear side of the axle in aneye 73. Preferably, and as shown in Figure l, there is provided on theaxle a stud 75. This stud is received in a slot 76 in plate 71, the`slot extending transversely of plate 71 and in the direction of thelong axis of the axle. The plate 71 is of less width than the springleaves so that, owing to its dimensions andVV the presence of the slot,it can be adjusted transversely of the vehicle. A shaft 77 is journaledin the eyes 73 of plates 71." This shaft may be rotated by means of anarm 81 suitably clamped to an intermedia-te position of shaft 77.. Thisarm 81 is to be pivotally connected to link 65. Art eac-h end of shaft 77 there is secured an arm 33, this arm being associated with mechanismfor actuating the front internal brake shoes 85 against the drums 13.

Above the spring 11 and also above the plates 71 is a block S7 suitablyshaped to accommodate the clips 67. The legs of the clips embrace thisblock 87, the spring 11 and the plates 71, and extendthrough the open-lings provided therefor in the 'spring seat of the axle, and nuts 39 areapplied to hold the parts assembled. The block 87f is formed with anupstanding arm 91, as shown in the drawing. This arm is formed at itsupper end with a tapered' opening 93 co-operating with a similarlyshaped cap 95 held by fastening means 95. The parts 93 and 95 form a.socket vfor lretaining a bushing 97, in which is journaled a rockshaft99.

Clamped to shaft 99 inwardly of and adjacent the bearing is an arm 101.Shaft 99 extends outwardly toward the brake drum of the wheel and isunited by a universal oint 103, of any preferred kind, with a shortshaft 105 journaled in a sleeve 107 carried by the dust plate or backingplate 108 which is, as

usual, secured to the steering knuckle of the A wheel. The joint 103 islocated substantially over the swivelling axis of the wheel so that thewheel may be swivelled for steering purposes without interfering withthe action of the brake. The short shaft 105, for the purpose ofapplying the brake, may be equipped with a cam 106 received between theadjacent ends of the brake band, or between the brake shoes, whicheverbethe form of brake used.

Pivoted to arm 101 is a forked clevis 113. A link 115 has an angled end117 passed through an opening in arm 83 0f shaft 77. The angled end hasa retainer and an antirattling spring 119, as shown in Figure 3. Link115 extends into the clevis 113 with which it has a threaded connection,as shown. It will therefore be seen that a clockwise movement of arm 83produces a similar movement of arm 101, rocks shaft 99, rotates the lcamand applies the brake.

lt will be noted that by the use of links 63 and 65 there is avoided thecommonly used system of links extending forward from each end of theequivalent of shaft 51. It Will also be seen that the parts 71 and 87are veryV conveniently clamped in position by the usual spring clips andthat these parts 871`and 71 serve to journal the necessary shaft foroperating the front wheel brakes.

l claim: Y Y Y j j Y 1. ln brake mechanism for vehicles, an axle,supporting springs, plates positioned between the axle and the springs,said plates having eyes located in alignment, an axle rockshaft journaled in said eyes, means to rotate said axle rockshaft, a blockabove each spring, means to clamp said block, spring,

and plate to the axle, each block having an upwardly directed arm,vbrake operating shafts journaled in said brackets, and connecting meansbetween said axle rockshaft and said brake operating shafts.

2. The invention defined by claim l, said plate being ofless 'width thansaid spring, a stud on said axle, said plate having a slot to receivesaid stud topermit adjustment ofthe ien brake operating shafts, means torotate the i axle rockshaft to apply the brake.

In testimony whereof I aiix my signature.

C. I. BOOK.

